blackhole123 Posted April 8, 2010 Share Posted April 8, 2010 I can accept the explanation for both phenomena independently. 4s is lower in energy than 3d so it fills first. And 3d penetrates better than 4s so 4s leaves first. Accepting them at the same time does not seem possible. If 4s is lower in energy then how can 3d penetrate better? If one is true then it seems to make the other not make sense! If electron filling is based on energy levels, then how can something be lower than another shell when filling, but higher in energy when losing? 1 Link to comment Share on other sites More sharing options...
ianhowson Posted April 16, 2010 Share Posted April 16, 2010 I also would like to know. Does nobody know? Link to comment Share on other sites More sharing options...
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